Pinking attachment



Jan. 29, 1935. E, HORN 1,989,596

PINKING ATTACHMENT Filed yApril 12, 1933 ATTORNEY Patented Jan. 279,1935 UNITED STATES 'PATENT ortica 1` Claim.

for sewing machines.

One of the objects of the invention is the proh vision of means wherebythe pinking operation is accomplished simultaneously with the seamingoperation.

The invention will be fully and comprehensively understood from aconsideration of the following detailed description when read inconnection with the accompanying drawing which forms part of theapplication, with the understanding, however, that the improvement iscapable of extended application and is not confined to the exact showingof the drawing nor to the precise construction` described and,therefore, such changes and modiflcations may be made therein as do notaffect the spirit of the invention nor exceed the scope thereof asexpressed in the appended claim.

In the drawing:

Fig. 1 is a plan view, partly in section, of the improved pinkingattachment of my invention, the same being shown associated with a rockshaft which forms part of the regular sewing machine equipment.

Fig. 2 is an elevational view of the mechanism shown in Fig. 1.

Fig. 3 is a section taken approximately on the broken line 3 3 of Fig.2; and

Fig. 4 is a perspective View of a ratchet employedin the mechanism shownin Figs. 1 to 3, inclusive.

Referring to the drawing for a more detailed description thereof, thenumeral 5 indicates a feed shaft associated with the seaming mechanismof -a sewing machine and forming part of the usual equipment. Said feedshaft has a rocking motion about its axis'. An arm 6 is secured to theshaft 5 by meansof a clamp '7. Said arm 6 is adjustably and pivotallyconnected to a rocker arm 8 so that the speed of the pinking mechanismto be described may be varied. The rocker arm 8 passes thru a plate 9and is curvedly offset at its upper portion, its upper end beingrpivotally connected at 10 to a member 11 which is shown in detail inFig. 4 and which bears against and functions to move forwardly in stepsa roller 12 mounted in a block 9a which is secured to the plate 9. Theroller 12 is secured by means of screws 13a to a pinking roller 13. Therocking motion of the feed shaft 5 about its axis gives an up and downThis invention relates to pinking attachments :movement to the arm 8 andconsequently to the member 11, whereby the rollers 12 and 13 are movedforward on the upwardstrokes of the rocker arm.

The rollers 12 and 13 are rotated forwardly against the action of a coilspring 15 which is secured to the block 9a at the point 16 and to themember 11. An end of the coil spring is secured to the member 11 bylying in a groove 11a and being bent over the inner end of said groove.The 10 member 11 is provided with a recess 11b in which lies a portionof the periphery of the roller 12 which, as shown in Fig. 1, isrecessed. A member 18, best shown in Fig. 2, and placed in an inclinedposition, functions to prevent backward motion l5 'of the rollers 12 and13 and is pressed against the former roller by means of a spring 19 andis backstopped by bracket 20 secured to the block 9a. A roller 21 ispositioned in a slot 22 in the plate 9 and extends above and below saidslot, as clearly 20 shown in Figs. 2 and 3, and is pressed upwardlyagainst the pinking roller 13 by means of a spring 23, the ends of whichare secured to the lower face of the plate 9 by screws 24, as shown inFig. 2. The tension'of the spring 23 may be adjusted'by 25 means of thescrews 24 so that the pressure of the roller 21 against the pinkingroller may be varied. The cloth which is to be simultaneously seamed andpinked passes between the roller 21 and the pinking roller 13 and lieson the plate 9 which is 30 provided with a slot 25, thru which thesewing needle works. As previously stated, the feed shaft 5 is connectedwith the sewing mechanism so that the pinking' and sewing operations aresimultaneously performed.

What is claimed as new is:

The combination with a rocker feed shaft, of a pinking roller and meansconnected with said feed shaft for intermittently moving said pinkingroller, said means being a rocker arm which in- 40 cludes a part'rigidlysecured to said shaft and extending laterally therefrom and an uprightpart pivotally connected to the lateral part, said roller being providedwith an annular fiange extending from one side thereof, a dog pivotallyconnected to the upper end of the rocker arm and having a. recessreceiving said flange, and a spring exerting' pressure downwardly onsaid dog.

EMIL HORN.

